Okay listen up people! Have you ever wanted to find the unhacked versions of the Super Mario Bros., Zelda or Donkey Kong ROMs? Or maybe even Dig Dug or Mario Bros. for MAME, only to find that the game is protected by the IDSA (like on ROMNation.net)? Well, kiddies, here is your solution
http://www.planetemu.net/
This site is all in French, but it's not hard to figure it out really (it's only French for christ's sake LOL!). And the only drawback is that you can only make one download every 5 minutes, but this is a safety measure the site uses to preserve bandwidth. So go now, my children. Go find that ROM you've been dreaming of and searching for. Then drool and stay up all night playing games, and rub one off even (LOL!!!) You can thank me starting.........now.
P.S. Sorry, but this site does not have N64 ROMs or SEGA CD ISOs, or even PSX, PS2, SEGA Saturn, SEGA Dreamcast, 3DO (what a relic), Game Cube, or XBOX ISOs. But, if it came on a cartridge (prior to N64), or was in the arcades, it's there. Also, you can find a few CHDs here and there. The Killer Instinct CHDs are in the U64Emu section, and some are in the MAME section. But if you really need CHDs then here is a link you can check out:
http://www.efmovie.com/mame.htm
Scroll all the way down the page until you see them, they are close to the bottom. You will also need Bit Torrent for that site as well, but that site has a link to where you can get it.
Edit - one link removed for PC warez
Zorlon.